JPH0214027Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for preventing Newton's ring from occurring on a liquid crystal display panel.

In a normal liquid crystal display board, a lower reflector 1 and a liquid crystal glass 3 are attached with adhesive 2, as shown in Figure 1.
The adhesive 2 acts as a spacer between the liquid crystal glass 3 and the lower reflector 1, and prevents them from coming into close contact with each other. Therefore, Newton's ring does not occur. Note that 4 is an upper polarizing plate.

However, if characters, figures, meshes, etc. are printed on the bottom surface of the liquid crystal glass, when the liquid crystal glass 3 and the lower reflector plate 1 are bonded together with the adhesive 2, air bubbles will be introduced, making it impossible to bond the liquid crystal glass. 3 and the lower reflector 1 are used by stacking them together as individual parts.

Note that when printing characters, figures, meshes, etc. on the liquid crystal glass 3, they are generally printed on the lower surface because if printed on the upper surface, the characters, etc. will appear double.

Next, a conventional device for constructing a liquid crystal display panel using a liquid crystal glass 3 printed on the lower surface, a lower reflecting plate 1, and an upper polarizing plate 4 will be explained with reference to FIG. 5 is a substrate, and the lower reflector 1 is bonded to this substrate 5,
Further, a conductive rubber 6 is placed to electrically connect the substrate 5 and the liquid crystal glass 3 having an inverted convex shape. A liquid crystal glass 3 is placed thereon, and an upper polarizing plate 4 is further placed thereon. Then, hold the entire assembly with the liquid crystal mounting frame 7 and tighten with the tapping screws 8. By the above operation, the conductive pattern (connector portion) 3a of the liquid crystal glass 3 and the conductive pattern 5a on the substrate 5 can be connected by the conductive rubber 6.

However, in this case, if the tightening is weak, there is a risk of poor contact. Furthermore, if the liquid crystal mounting frame 7 is strongly tightened, the periphery of the liquid crystal glass 3 comes into close contact with the lower reflector 1, resulting in the formation of Newton rings there. In FIG. 2, numeral 9 indicates a silk-print pattern such as letters, figures, meshes, etc. printed on the lower surface of the liquid crystal glass.

This idea was designed to eliminate the drawbacks of the conventional ones as mentioned above, such as letters, figures, etc. at the bottom of the liquid crystal panel.
By forming a printing pattern such as a mesh, and also forming a printing pattern with the same thickness as the above printing pattern in the area around the bottom of the liquid crystal panel that is out of the effective field of view, when tightened with the liquid crystal mounting frame, the following Prevents close contact between the reflector and the LCD panel,
This is intended to prevent Newton's rings from occurring.

An embodiment of this invention will be described below with reference to FIG. Although FIG. 3 only shows the periphery of the liquid crystal glass, the same reference numerals as in FIGS. 1 and 2 indicate the same parts. Reference numeral 10 denotes a silk-print pattern formed by printing outside the effective viewing range A of the periphery of the liquid crystal glass 3 in the same way as the silk-print pattern 9 of characters, figures, meshes, etc. Since this peripheral printing pattern 10 can be printed in the same process as letters, figures, meshes, etc. 9, it has the advantage that the thickness can be made completely uniform. Moreover, since the steps are the same, there is no need for increased costs due to this work.

If a liquid crystal glass with this invention is used, even if the liquid crystal glass is tightened using the conventional method explained in FIG. Rings can be prevented from occurring.

What is important here is that the thickness of the silk-printed pattern 10 placed outside the effective field of view and the silk-printed pattern 9 of characters, figures, meshes, etc. be uniform. If the thickness is uneven, when the liquid crystal glass 3 is tightened, distortion will be applied to the liquid crystal glass, which may lead to shortened lifespan, deterioration, destruction, etc. of the liquid crystal glass.

In the above embodiment, silk printing is applied around the liquid crystal glass, but a tape or the like having the same thickness as the silk printing of characters, figures, meshes, etc. may be placed around the liquid crystal glass and tightened.

However, in this case, it is inferior to silk printing in terms of workability and cost increase.

As described above, according to this invention, a print pattern to prevent adhesion can be formed around the liquid crystal glass in the same process as printing letters, figures, meshes, etc., without increasing costs and causing Newton rings. This has the effect of making it possible to obtain a liquid crystal display panel that does not require any oxidation.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing a conventional liquid crystal display panel with a lower reflector bonded to it. Figure 2 is a cross-sectional view showing the assembly structure of a conventional liquid crystal display panel.
The figure is a side view of a liquid crystal glass showing an embodiment of this invention. In the figure, 1 is a lower reflecting plate, 3 is a liquid crystal glass, 4 is an upper polarizing plate, 5 is a substrate, 6 is a conductive rubber,
7 is a liquid crystal mounting frame, 8 is a tapping screw, 9 is a printed pattern such as letters, figures, meshes, etc. formed on the lower part of the liquid crystal glass, and 10 is a printed pattern for preventing adhesion formed around the liquid crystal glass.

Claims (1)

[Scope of utility model registration request] In a liquid crystal display board in which printed patterns such as letters, figures, meshes, etc. are formed on the lower part of the liquid crystal panel, and the liquid crystal panel is mounted and fixed on a reflective plate, it is also possible to print patterns around the lower part of the liquid crystal panel that are outside the effective field of view. A liquid crystal display board characterized in that a printed pattern having the same thickness as the above printed pattern is formed.